Painting Estimate Calculator for Painters

The form your customers fill out

A live calculator, not a static quote request. Your customer enters their details and watches the number update on the spot, which is what turns a browser into a booked job.

What it calculates

Prices interior and exterior by square footage
Adjusts for one, two, or three coats
Adds prep, patching, and priming labor
Charges per door, window, and trim run
Applies a ceiling-height or stairwell factor

Why it closes more deals

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A live number closes deals

Customers who see a real estimate the second they enter their details are far likelier to book than ones told to call for a quote. The number is the hook.

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Runs your most complex spreadsheet

Multi-tab workbooks, lookup tables, tiered rates, conditional line items, the lot. If the math runs in Excel, CalcForms runs it behind a clean form.

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Update it by chatting

Prices move. Ask Claude to change a rate, add an option, or insert a step and the live form updates in seconds. No developer, no redeploy.

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Backtest before you publish

Run your last 20 real jobs through it and tune the formula until the live estimate matches what you actually charge. Ship it once it lines up.

How this form was built

No template builder and no code. One message to Claude with the CalcForms connector switched on:

✦ Claude with the CalcForms connector

Build a painting estimate calculator. Inputs: project type (interior/exterior/both), square footage, number of coats, surface condition, and door/window count. Price interior at $2.25/sqft and exterior at $3.10/sqft for one coat, add 60% of the base rate per extra coat, multiply by a prep factor of 1.0/1.2/1.45, and add $35 per door or window. Show the homeowner an estimated painting price.

Done. I built Painting Estimate Calculator with your pricing and deployed it to forms.badabingapp.cc. The math runs server-side and every submission is saved with the inputs and email. Want to add a field or change a rate? Just tell me.

Build this exact form

CalcForms is a connector you add to Claude once. After that you build and edit forms just by chatting.

Add CalcForms to Claude. Open the Add custom connector dialog, name it Calcforms, and paste https://forms.badabingapp.cc. One time, about 60 seconds.
Paste the prompt below. Claude builds the form, wires in your math, and hands you a live URL.
Share it, then tweak by chatting. Put it on your site or send the link. Change a rate or add a field later just by asking.

Copy this prompt into Claude

"Build a painting estimate calculator. Inputs: project type (interior/exterior/both), square footage, number of coats, surface condition, and door/window count. Price interior at $2.25/sqft and exterior at $3.10/sqft for one coat, add 60% of the base rate per extra coat, multiply by a prep factor of 1.0/1.2/1.45, and add $35 per door or window. Show the homeowner an estimated painting price."

Example run: 1,600 sqft interior, 2 coats, some patching, 12 doors and windows: about $7,330 estimated painting price.

New to connectors? A connector (an MCP server) is a secure link between Claude and an app. The CalcForms connector lets Claude build, deploy, and update real calculator forms for you, all from the chat window.

Formulas it supports

area x rate per coat
extra coat add
prep condition factor
per door/window charge
interior vs exterior rate

FAQ

Does it separate interior and exterior pricing?

Yes. The project type field switches between your interior and exterior per-square-foot rates, or combines both on one quote.

How does it handle prep work?

A surface-condition field applies a prep multiplier for patching, sanding, and priming so heavy-prep jobs price higher automatically.

Can I charge separately for trim and doors?

Yes. Add a per-door, per-window, or per-linear-foot trim line and the calculator totals them into the estimate.

Will the estimate match my walkthrough quotes?

Backtest against your past jobs and adjust the rates and prep factors until the live number lines up with what you actually bid.

Build yours in the next 10 minutes.

Your first form is free. No credit card.

Start free →